2012 won't start intermittent - Ford Powerstroke Diesel Forum

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post #1 of 6 Old 05-17-2013, 06:46 PM Thread Starter
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2012 won't start intermittent

Came out from store put key in ignition 2 warnings came up trailer brake module fault and service advance trac . Tried off an on while waiting for tow . After an hour began starting intermittently. I notice when it won't start glow plug icon doesn't appear when key is turned to position where its supposed to but a minute later it does and will start. Drove it to the dealer with tow truck following.Does this sound familiar to anyone? I am travelling out of state with it on thurs. and am quite aggravated.
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post #2 of 6 Old 05-21-2013, 06:30 AM Thread Starter
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update

Dealer checked yesterday couldn't replicate the issue .They checked bcm pcm history etc. no trouble found. Drive 20+ miles no problem then same warnings came on truck stalled ,turned key off and on three times restarted no problem. my two worst fears intermittent electrical issues and no one on this site or dealer is familiar with. This doesn't sound familiar to anyone?
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post #3 of 6 Old 05-21-2013, 04:24 PM
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only time my truck failed to start was due to the throttle actuator sticking closed. did not generate a code until I FORCED it to start by fogging it with ether. It acts completely stupid every time the batteries get weak... but doesnt die..
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post #4 of 6 Old 01-13-2016, 02:14 PM
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Quote:
Originally Posted by Canrckid View Post
Dealer checked yesterday couldn't replicate the issue .They checked bcm pcm history etc. no trouble found. Drive 20+ miles no problem then same warnings came on truck stalled ,turned key off and on three times restarted no problem. my two worst fears intermittent electrical issues and no one on this site or dealer is familiar with. This doesn't sound familiar to anyone?
Did you ever solve the mystery of what was causing this? My truck is doing this exact same thing now.

Mike
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post #5 of 6 Old 01-13-2016, 05:46 PM
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^^yes! check the batteries. specifically the passenger side battery. there is a high current junction that runs directly off of it. that junction feeds power to many devices, including the pcm. a weak battery can and will cause a no crank condition, not a slow crank like older vehicles, but no crank. not to mention all sorts of other issues. have them load tested. the colder weather is very straining on your charging system

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post #6 of 6 Old 01-15-2016, 08:35 AM
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Well, I appreciate you replying right back to me. When you say right battery I presume you mean the passenger side. I was stuck up town at 9 at night when I registered with the site to send my question to you. After I sent it having no better option I popped the hood to have a look at the fuse and relay box. I was going to pull some relay and swap places just to see if it would change anything. I had inadvertently left the Ignition switch on and while trying to pull F48 I heard a mechanical/vacuum sound as something got energized. I tried to start it and sure enough it did. I drove home that night and next morning the same story. No start, trailer brake module fault and seevice advance track. This time I deliberately left ignition on and went straight for F48. It immediately made the same noise and started. This happened 4 more times that morning. At the post office, at Oreilly's at Ford where I purchased a new relay and at the minute lube place where I had the batteries load tested. Interestingly the driver side battery tested bad so I changed them both. With new fully charged batteries on both sides it wouldnt start until I messed with F48. That is when I replaced F48 with a new relay and the problem has gone away.
Mike
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